Pump



Aug. 14, 1945. F. E. BRADY, JR 2,382,539

PUMP

Filed Sept. 8, 1941 s Sheets-Shet 1 Zhmcntor M'M'Yha attorney 5 1945. F. E. BRADY, JR 2,382,539

PUMP

Filed Sept. 8, 1941 3 Sheets-Sheet 2 Fig. 5

inventor uww WM Cttorncgs Aug. 14, 1945. F. E. BRADY, JR

PUMP

Filed Sept. 8, 1941 3 Sheets-Sheet 3 Patented Aug. 14, 1945 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to fluid pumps. One object of the invention is the provision of a pump construction embodying a pump housing .detachably connected to and supported by a frame or bracket which, in turn is adapted for connection to the motor which operates the pump, the frame having passages through which fluid is supplied to or from the pump housing, the construction being such that the pump housing together with the fluid impelling means and a driving member which is mounted in the pump housing may be readily separated as a complete unit without disturbing pipe connections to the frame.

Another object of the invention is the provision of a pump construction embodying the dctachable pump unit carried by a separate frame member which in turn is mounted on the motor that drive the pump, the pump unit in which the fluid impelling means is operably mounted with a suitable operating clearance or fit being readily removable from the frame without disturbing pipe connections and without in any way changing the running fits or bearings of the operating parts of the pump.

Another object of the invention is the provision of a construction of the character mentioned in which the frame, to which the pump housing is detachably connected, is detachably supported on one end of the motorhousing, and

the driving connection between the motor shaft and the fluid impelling means of the pump is established when the pump is applied in its proper position on the pump carrying frame.

Other objects and advantages of the invention will be apparent from the following description, the appended claims, and the accompanying drawings, in which,

Fig. 1 is a side elevation, shown partly in central vertical section through a pump construction embodying the present invention;

Fig. 2 1s an end view of the pump assemblage;

Fig. 3 is a central horizontal section showing the pump support and a portion of the motor on which the pump support is carried;

Fig. 4 is a horizontal section through the pump unit taken on the line 44 of Fig.

Fig. 5 is a vertical section on the line 5-5 of Fig. 2;

- Fig. 6 is an end elevation of ing frame;

Fig. 7 is an end view of a pump support of a the pump supportmod fied construction; and I Fig. 8 is a central vertical section on line 8-8 of Fig. 7 and also showing the pump in supported position. I

Referring more particularly to the drawings, in which the same reference numerals have been applied to the sameparts in the several views,

Figs. 1 to 6, inclusive, show a preferred em'bodiment of the invention as applied to a pump con stru'ction in which the impelling action is obtained by intermeshing gears of a pump unit which is carried adjacent an end of the power mean or motor by means ofwhich the pump is driven, herein shown as an \electric motor I0 which may be of 1 any suitable character. Detachably connected to the housing ll of the motor by means of suitable securing bolts l3 or the like is a bracket or frame I. One end of this frame flts against the end of the motor housing adjacent the projecting end portion of the motor shaft l2. As shown, the frame H has an upwardly arched wall and is provided with an opening I5 through which the endof the motor shaft is accessible.

In the frame I4 there are.two passages I6 and I1 forming fluid supply and discharge conduits for the fluid supplied to and from the pump. One endof the passage I6 is adapted to be connected to a fluid supply pipe, which may be readily screwed into the threads ill at a location that is readily accessible, preferably at the top 01' the framefand the passage I! is similarly arranged and adapted to be readily connected to a fluid discharge pipe. The passages 16 and I1 terminate in ports l9 and 20 which are provided in the 'wall portion M of the frame and which, as shown,

face in a direction away from the motor. The wall portion 2| of the frame is adapted to be readily secured to the hdusing 22 of a. fluid pump unit, and forms a support for the pump, the ports 19 and 20 being adapted for registration with the inlet and discharge openings of the pump housing. The pump housing together with'the pumping means and a drive member or shaft portion connected to the pumping means forms a readily removable unit which may be readily secured to the pump supporting frame as by means of bolts 24,.and when the pumping unit is brought into I place, its shaft portion is coupled to the end of the motor shaft.

The pumping means includes a fluid impeller 02'' impellers operating with a small clearance and accurately carried in proper position in the housing, the pumping means being shown in Figs. 1 to 6 inclusive as embodying a pair of intermeshing gears 25 and 26 rotatable inthe pump chamber 21. The pump chamber is formed by an end wall 28 and a. connected pump housing portion 29, these two parts being secured together as by means of screws or bolts 30 which are removable after the pump housing has been disconnected from its supporting frame. The parts fl and ll of the pump housing rotatably support the shaft," of gear 2' and the shaft If on which the gear 28 is fixed as by meansof the key 33. The bearings for these shafts serve to accurately locate the gears in proper intermeshing relation and with the pr p r minimum clearance between the gear teeth and the arcuate surfaces of the fluid chamber. As the gears revolve, it will be understoodthat fluid is pumped when the pump is positioned on the carryinl to the outlet opening 34 of the pump housing from the inlet opening ll, and since these openings register respectively with the ports and I l of the pump supporting frame, a flow of fluid will take place from the inlet pipe connected to the threads of the passage I in the frame and be supplied through a pipe connected to the passage ll. A suitable sealing gasket fl is provided between the end wall II of the pump housing and the carrying wall II of the supportin frame to seal the connection between the passages in the frame and the inlet and discharge openings of the Dump housing. a

As the pump housing is moved into position, by axially moving it towards the motor, a connection is established between the end of the motor shaft l2 and the coupling member I! which is flxed on the end of the pump shaft 32 and having a keyway which flts over a key on the motor shift. In the construction shown. the supporting bracket ll forms a partial enclosure around the end of the motor shaft and around the coupling 8! and protects those parts.

As will now be apparent; the close runnin fits and accurately made bearings of the operating parts of the pump unit will be maintained when the pump housing is separated from its support I4. and the removal of the pump may be eifected without disturbing the connection of the pipe lines leading to the pump: The removable pump housing together with the pumping means and the shaft portion "by means of which the latter are driven may be readily removed and replaced by a new pump head by a layman or mechanic without reouiring any p cial tools.' The pump head may be rebuilt or repaired by one thoroughly skilled in such work. Figs. 8 and s-show a modification of themvention in which the pum ing means is a turbine wheel 4! o erating in a housing 48. The housing preferablv comprises an inner wall ll and an outer wall portion ll to which it is connected hv screws or bolts ll. These walls'prcvide a fluid raceway II in which the turbine blades travel. The impeller I! is fixed on a shaft I! which is iournalled in the end wallsof the housing and has a projecting portion which is adapted to be readilyccupled to the end of a motor shaft, a portion of which is shown at 48. The pump housing is detachably mounted by means of securing bolts 4'! on a motor supporting frame II which is detachably connected by means of may be normally covered by a removable cover plate I held in place by screws 04. The pump supporting frame It is formed to provide passages and I4 forming fluid conducting portions that lead to supply and "discharge pipes that may be connected to the pipe connections II and II. The other ends of the passages I3 frame and in driving connection with the motor shaft, the raceway of the pump will be connected to the fluid supply and discharge conduits in the pump supporting frame, and as will be apparent,, the pump unit including the shaft 41, the impeller and the housing walls It and 44 may be readily separated as a complete unit without disturbing the operating clearances of those parts, and without disturbing the pipe connections leading to the pump supporting frame lll.

While the forms of apparatus herein described constitute preferred embodiments 'of the invention, it is to be imderstood that the invention is not limited to these precise forms of apparatus. and that changes may be made therein without departing from the scope of the invention which is defined in the appended claims.

What is claimed is:

1. In combination with a motor having a frame at one end thereof to which fluid supply and discharge pipes are secured, said frame having fluid passages formed therein communicating respectively with said pipes, a detachable selfccntained pump unit adapted to be driven by said motor comprising a rotary pump including intermeshing goals, a pump housing member having a recess therein forming a pump chamber for receiving said gears, said housing member also having a recess for locating and accurately defining the position ofsa side of said pump chamber, a housing wall adapted to be received a in said recess to form said side of said chamber and complete the closure thereof, means for securing said housing will directly to said housing member with said gears therebetween in predetermined operating relation thereto, means engageable with said frame for assembling said unit in operative position and drawing said unit tightly against the frame with said housing wall located in abutting contact with the frame, said wall having cooperating fluid passages arranged to register and establish communication with said fluid passages in said frame, and a detachable drive connection from said rotary pump to said motor adapted to be established upon assembly of said unit on said frame.

2. In combination with a motor having a frame at one end thereof to which fluid supply and discharge pipes are secured and having fluid passages formed therein, a, detachable self-contained pump unit adapted to be driverrby said' motor comprising a rotary pump including intermeshing gears, inner and outer pump housing walls on opposite sides of said gears, said outer wall having a recess forming a pump chamber and a recess of greater radial extent than' said pump chamber for receiving and accurately *locating said inner housing wall therein, means extending through said inner wall and engageable with said outerwall for securing said housing walls directly to each other with said gears therebetween in predetermined operating relation in said pump chamber, means extending through the outer of said walls and engageable with said frame for assembling said unit in operative position and drawing said unit tightly against the frame with said inner wall located in abutting contact with the frame, said inner wall having cooperating fluid passages arranged to register and establish communication said fluid passages in said frame, and a detachable drive connection from said rotary pump to said motor adapted to be established upon assembly of said unit on said frame.

3. In combination with a motor having a frame at one end thereof to which fluid supply and discharge pipes are secured and having fluid passages formed therein, a detachable self-contained pump unit adapted to be driven by said 'motor comprising a pair of intermeshing gears, inner and outer pump housing walls on opposite sides of said gears in predetermined close fitting relation thereto, means for securing said housing walls directly to each other with said gears therebetween in predetermined operating relation thereto, means carried entirely by said walls and free of direct contact with said frame for rotatably supporting said gears, means extending through the outer of said walls and engageable with said frame for assembling said unit in operative position and drawing said unit tightly against the frame with said inner wall located in abutting contact with the frame and said securing means concealed by said frame and inaccessible in said assembled relation, said inner wail having cooperating fluid passages arranged to register and establish communication with said fluid passages in said frame, and a detachable drive connection from said pump unit to said motor adapted to be established upon assembly of said unit on said frame.

meshing gears, a shaft for each of said gears,

pump housing walls on opposite sides of said gears forming a pump chamber and journaling each of said shafts therein, one of said shafts projecting beyond one of said pump walls and out of direct supporting contact with said frame forming a detachable driving member adapted to 1 be connected with said motor shaft, means extending through one of said pump walls for securing said walls directly together with said gears therebetween, said walls having cooperating interiitting parts providing for maintaining said two walls in predetermined relation to each other and with said gears in predetermined close fitting operating relation therebetween, and means extending through the outer of said walls and engaged within said frame for drawing said unit tightly against the frame with the other,

said wall in abutting contact therewith providing for separation and removal of said unit as an assembled operative pump, said other wall having fluid passages formed therein adapted to register with said fluid passages of said frame in the'assembled position thereof.

FRANCISE, BRADY, JR. 

